.theme-mask-custom {
    background-color: black;
    transition: 0.3s;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    position: fixed;
    z-index: 99;
}
.bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
.sun {
    margin: 0;
    padding: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300rem;
    height: 300rem;
    background-color: orange;
    border-radius: 50%;
    /* display: none; */
}
.moon {
    margin: 0;
    padding: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(calc(-50% + -80rem), calc(-50% + -90rem));
    width: 300rem;
    height: 300rem;
    border-radius: 50%;
    box-shadow: 80rem 90rem 0 cyan;
}
.sea {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 35%;
    backdrop-filter: blur(100rem);
    /* -webkit-backdrop-filter: blur(100rem); */
    z-index: 100;
}
.sun,
.moon,
.sun-box,
.moon-box,
.bg {
    transition: all 1s ease-in-out;
}
.sun-box,
.moon-box {
    position: relative;
    overflow: hidden;
}
.light .sun-box {
    height: 100%;
}
.light .moon-box {
    height: 0;
}
.light .bg {
    background-color: #ffeea2;
}
.dark .sun-box {
    height: 0;
}
.dark .moon-box {
    height: 100%;
}
.dark .bg {
    background-color: #040720;
}
.btn-box {
    position: absolute;
    top: 5rem;
    left: 5rem;
    z-index: 101;
    display: flex;
    flex-direction: row;
}
.btn-box div {
    background: rgba(255, 255, 255, 0.7);
    color: #000;
    width: 90rem;
    height: 40rem;
    line-height: 40rem;
    text-align: center;
    margin: 5rem;
    font-size: 14rem;
    border-radius: 5rem;
    cursor: pointer;
}
.btn-box div:hover {
    background: #fff;
}
